1621.
The radius and height of a cylinder are in the ratio 6 : 7 and its volume is 792 cm3. Calculate its curved surface area in cm2.
(A)
490
(B)
226
(C)
264
(D)
262
1622.
In ∆PQR, PR = 10 cm. Find the length of PT, where ST∥QR. Given that PS = 6 cm and QS = 14 cm.
(A)
2 cm
(B)
4 cm
(C)
1.5 cm
(D)
3 cm
1623.
In an election between two candidates, one got 65% of the total valid votes. 20% of the votes were invalid. If the total number
of votes was 7,500, the number of valid votes that the other candidate got was:
(A)
1,700
(B)
2,100
(C)
4,300
(D)
1,900
1624.
L and M are the mid points of sides AB and AC of a triangle ABC, respectively, and BC = 18 cm. If LM || BC, then find the
length of LM (in cm).
(A)
6
(B)
3
(C)
9
(D)
12
1625.
At the beginning of day 1 of a month, Rajesh has 500 eggs. He sells 20% of the eggs by the end of the day and added b% of
the eggs at the beginning of the next day and sold 20% of the eggs at the end of the next day. This pattern continued up to
the end of the third day of the month when he is left with 1024 eggs. The value of b is equal to:
(A)
20
(B)
10
(C)
500
(D)
100
1626.
In ∆ABC the straight line parallel to the side BC meets AB and AC at the points P and Q, respectively. If AP = QC, the length
of AB is 12 cm and the length of AQ is 2 cm, then the length (in cm) of CQ is:
(A)
6
(B)
4
(C)
3
(D)
2
1627.
Find the total amount of debt that will be discharged by 5 equal instalments of ₹200 each, if the debt is due in 5 years at 5%
p.a. at simple interest.
(A)
(B)
(C)
(D)
1628.
Mithila covers 50 km by bus in 90 minutes. After deboarding the bus, she takes rest for 15 minutes and covers another 30
km by a taxi in 35 minutes. Find the average speed (in km/h) for the whole journey.
(A)
(B)
(C)
(D)
1629.
A policeman received information that a thief is at a distance of 1.5 km from him. The thief starts moving by car and the
policeman chases him by car. The thief and the policeman are moving at the speeds of 90 km/h and 120 km/h respectively.
At what distance (in km) will the police catch the thief?
(A)
45.0 km
(B)
5 km
(C)
6 km
(D)
4.5 km
1630.
The perimeter of a triangle is 36 units. Its area cannot be more than ______ square units.
